Influence of phenol on ammonia removal in an intermittent aeration bioreactor treating biologically pretreated coal gasification wastewater.
Influence of phenol on ammonia removal in an intermittent aeration bioreactor treating biologically pretreated coal gasification wastewater.
复制标题
DOI：
10.1016/j.jes.2015.08.013
复制
发表时间：
2016-05
影响因子：
6.9
通讯作者：
Chunyan Xu;Hong-jun Han;Shengyong Jia;Qian Zhao
中科院分区：
文献类型：
--
作者：
Chunyan Xu;Hong-jun Han;Shengyong Jia;Qian Zhao
研究了一种实验室规模的间歇曝气生物反应器来处理生物预处理的主要成分为NH3-N和苯酚的煤气化废水。结果表明，增加苯酚负载量对NH3-N的去除有不利影响；苯酚负荷为 40 mg 苯酚/(L·天) 时，出水浓度为 7.3 mg/L，是 200 mg 苯酚/(L·天) 时的 36.3%。氨单加氧酶对苯酚的抑制作用比羟胺氧化还原酶更敏感，在 200 mg 苯酚/(L·天) 时，活性抑制分别为 32.2% 和 10.5%。由于间歇曝气条件，观察到亚硝化型硝化作用和同步硝化反硝化作用（SND），最大SND效率为30.5%。此外，氨氧化菌（AOB）和反硝化菌是荧光原位杂交鉴定的主要类群。然而，随着苯酚负荷的增加，它们的相对丰度呈现相反的变化，AOB 和反硝化细菌的相对丰度分别从 30.1% 增加到 17.5%，从 7.6% 增加到 18.2%。
A laboratory-scale intermittent aeration bioreactor was investigated to treat biologically pretreated coal gasification wastewater that was mainly composed of NH3-N and phenol. The results showed that increasing phenol loading had an adverse effect on NH3-N removal; the concentration in effluent at phenol loading of 40 mg phenol/(L·day) was 7.3 mg/L, 36.3% of that at 200 mg phenol/(L·day). The enzyme ammonia monooxygenase showed more sensitivity than hydroxylamine oxidoreductase to the inhibitory effect of phenol, with 32.2% and 10.5% activity inhibition, respectively at 200 mg phenol/(L·day). Owing to intermittent aeration conditions, nitritation-type nitrification and simultaneous nitrification and denitrification (SND) were observed, giving a maximum SND efficiency of 30.5%. Additionally, ammonia oxidizing bacteria (AOB) and denitrifying bacteria were the main group identified by fluorescentin situhybridization. However, their relative abundance represented opposite variations as phenol loading increased, ranging from 30.1% to 17.5% and 7.6% to 18.2% for AOB and denitrifying bacteria, respectively.